16215220163 has 4 divisors (see below), whose sum is σ = 16234097880. Its totient is φ = 16196342448.

The previous prime is 16215220159. The next prime is 16215220171. The reversal of 16215220163 is 36102251261.

16215220163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36102251261 = 577 ⋅62568893.

It is a cyclic number.

It is not a de Polignac number, because 16215220163 - 2² = 16215220159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16215220183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9437570 + ... + 9439287.

It is an arithmetic number, because the mean of its divisors is an integer number (4058524470).

Almost surely, 2^16215220163 is an apocalyptic number.

16215220163 is a deficient number, since it is larger than the sum of its proper divisors (18877717).

16215220163 is an equidigital number, since it uses as much as digits as its factorization.

16215220163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18877716.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 16215220163 in words is "sixteen billion, two hundred fifteen million, two hundred twenty thousand, one hundred sixty-three".